Problem switching gas in Subsurface 4.5.3

[mddolson]

I found my mistake last night. By mistake I have been using "edit profile" to add the gas switch.
So last night I changed my work flow:from
1) Edit dive, add 2nd gas, start & end pressures, ACCEPT CHANGE".
2) EDIT PROFILE
3) Right click on profile (graph) select 50EAN.
4) ACCEPT CHANGE (in edit profile)

(I wrongly assumed that I had to edit the profile to make the gas switch.)

to this
1) Edit dive.........Accept Change.
2) Right click on graph, & select 50EAN.

Now it works